[deliverable/linux.git] / net / mac802154 / ieee802154_dev.c

/*
 * Copyright (C) 2007-2012 Siemens AG
 *
 * Written by:
 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
 *
 * Based on the code from 'linux-zigbee.sourceforge.net' project.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>

#include <net/netlink.h>
#include <linux/nl802154.h>
#include <net/mac802154.h>
#include <net/ieee802154_netdev.h>
#include <net/route.h>
#include <net/wpan-phy.h>

#include "mac802154.h"

int mac802154_slave_open(struct net_device *dev)
{
	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	struct mac802154_sub_if_data *subif;
	struct mac802154_priv *ipriv = priv->hw;
	int res = 0;

	ASSERT_RTNL();

	if (priv->type == IEEE802154_DEV_WPAN) {
		mutex_lock(&priv->hw->slaves_mtx);
		list_for_each_entry(subif, &priv->hw->slaves, list) {
			if (subif != priv && subif->type == priv->type &&
			    subif->running) {
				mutex_unlock(&priv->hw->slaves_mtx);
				return -EBUSY;
			}
		}
		mutex_unlock(&priv->hw->slaves_mtx);
	}

	mutex_lock(&priv->hw->slaves_mtx);
	priv->running = true;
	mutex_unlock(&priv->hw->slaves_mtx);

	if (ipriv->open_count++ == 0) {
		res = ipriv->ops->start(&ipriv->hw);
		WARN_ON(res);
		if (res)
			goto err;
	}

	if (ipriv->ops->ieee_addr) {
		__le64 addr = ieee802154_devaddr_from_raw(dev->dev_addr);

		res = ipriv->ops->ieee_addr(&ipriv->hw, addr);
		WARN_ON(res);
		if (res)
			goto err;
		mac802154_dev_set_ieee_addr(dev);
	}

	netif_start_queue(dev);
	return 0;
err:
	priv->hw->open_count--;

	return res;
}

int mac802154_slave_close(struct net_device *dev)
{
	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	struct mac802154_priv *ipriv = priv->hw;

	ASSERT_RTNL();

	netif_stop_queue(dev);

	mutex_lock(&priv->hw->slaves_mtx);
	priv->running = false;
	mutex_unlock(&priv->hw->slaves_mtx);

	if (!--ipriv->open_count)
		ipriv->ops->stop(&ipriv->hw);

	return 0;
}

static int
mac802154_netdev_register(struct wpan_phy *phy, struct net_device *dev)
{
	struct mac802154_sub_if_data *priv;
	struct mac802154_priv *ipriv;
	int err;

	ipriv = wpan_phy_priv(phy);

	priv = netdev_priv(dev);
	priv->dev = dev;
	priv->hw = ipriv;

	dev->needed_headroom = ipriv->hw.extra_tx_headroom;

	SET_NETDEV_DEV(dev, &ipriv->phy->dev);

	mutex_lock(&ipriv->slaves_mtx);
	if (!ipriv->running) {
		mutex_unlock(&ipriv->slaves_mtx);
		return -ENODEV;
	}
	mutex_unlock(&ipriv->slaves_mtx);

	err = register_netdev(dev);
	if (err < 0)
		return err;

	rtnl_lock();
	mutex_lock(&ipriv->slaves_mtx);
	list_add_tail_rcu(&priv->list, &ipriv->slaves);
	mutex_unlock(&ipriv->slaves_mtx);
	rtnl_unlock();

	return 0;
}

static void
mac802154_del_iface(struct wpan_phy *phy, struct net_device *dev)
{
	struct mac802154_sub_if_data *sdata;
	ASSERT_RTNL();

	sdata = netdev_priv(dev);

	BUG_ON(sdata->hw->phy != phy);

	mutex_lock(&sdata->hw->slaves_mtx);
	list_del_rcu(&sdata->list);
	mutex_unlock(&sdata->hw->slaves_mtx);

	synchronize_rcu();
	unregister_netdevice(sdata->dev);
}

static struct net_device *
mac802154_add_iface(struct wpan_phy *phy, const char *name, int type)
{
	struct net_device *dev;
	int err = -ENOMEM;

	switch (type) {
	case IEEE802154_DEV_MONITOR:
		dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
				   name, mac802154_monitor_setup);
		break;
	case IEEE802154_DEV_WPAN:
		dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
				   name, mac802154_wpan_setup);
		break;
	default:
		dev = NULL;
		err = -EINVAL;
		break;
	}
	if (!dev)
		goto err;

	err = mac802154_netdev_register(phy, dev);
	if (err)
		goto err_free;

	dev_hold(dev); /* we return an incremented device refcount */
	return dev;

err_free:
	free_netdev(dev);
err:
	return ERR_PTR(err);
}

static int mac802154_set_txpower(struct wpan_phy *phy, int db)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	if (!priv->ops->set_txpower)
		return -ENOTSUPP;

	return priv->ops->set_txpower(&priv->hw, db);
}

static int mac802154_set_lbt(struct wpan_phy *phy, bool on)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	if (!priv->ops->set_lbt)
		return -ENOTSUPP;

	return priv->ops->set_lbt(&priv->hw, on);
}

static int mac802154_set_cca_mode(struct wpan_phy *phy, u8 mode)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	if (!priv->ops->set_cca_mode)
		return -ENOTSUPP;

	return priv->ops->set_cca_mode(&priv->hw, mode);
}

static int mac802154_set_cca_ed_level(struct wpan_phy *phy, s32 level)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	if (!priv->ops->set_cca_ed_level)
		return -ENOTSUPP;

	return priv->ops->set_cca_ed_level(&priv->hw, level);
}

static int mac802154_set_csma_params(struct wpan_phy *phy, u8 min_be,
				     u8 max_be, u8 retries)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	if (!priv->ops->set_csma_params)
		return -ENOTSUPP;

	return priv->ops->set_csma_params(&priv->hw, min_be, max_be, retries);
}

static int mac802154_set_frame_retries(struct wpan_phy *phy, s8 retries)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	if (!priv->ops->set_frame_retries)
		return -ENOTSUPP;

	return priv->ops->set_frame_retries(&priv->hw, retries);
}

struct ieee802154_dev *
ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops)
{
	struct wpan_phy *phy;
	struct mac802154_priv *priv;
	size_t priv_size;

	if (!ops || !ops->xmit || !ops->ed || !ops->start ||
	    !ops->stop || !ops->set_channel) {
		pr_err("undefined IEEE802.15.4 device operations\n");
		return NULL;
	}

	/* Ensure 32-byte alignment of our private data and hw private data.
	 * We use the wpan_phy priv data for both our mac802154_priv and for
	 * the driver's private data
	 *
	 * in memory it'll be like this:
	 *
	 * +-----------------------+
	 * | struct wpan_phy       |
	 * +-----------------------+
	 * | struct mac802154_priv |
	 * +-----------------------+
	 * | driver's private data |
	 * +-----------------------+
	 *
	 * Due to ieee802154 layer isn't aware of driver and MAC structures,
	 * so lets allign them here.
	 */

	priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len;

	phy = wpan_phy_alloc(priv_size);
	if (!phy) {
		pr_err("failure to allocate master IEEE802.15.4 device\n");
		return NULL;
	}

	priv = wpan_phy_priv(phy);
	priv->hw.phy = priv->phy = phy;
	priv->hw.priv = (char *)priv + ALIGN(sizeof(*priv), NETDEV_ALIGN);
	priv->ops = ops;

	INIT_LIST_HEAD(&priv->slaves);
	mutex_init(&priv->slaves_mtx);

	return &priv->hw;
}
EXPORT_SYMBOL(ieee802154_alloc_device);

void ieee802154_free_device(struct ieee802154_dev *hw)
{
	struct mac802154_priv *priv = mac802154_to_priv(hw);

	BUG_ON(!list_empty(&priv->slaves));

	mutex_destroy(&priv->slaves_mtx);

	wpan_phy_free(priv->phy);
}
EXPORT_SYMBOL(ieee802154_free_device);

int ieee802154_register_device(struct ieee802154_dev *dev)
{
	struct mac802154_priv *priv = mac802154_to_priv(dev);
	int rc = -ENOMEM;

	priv->dev_workqueue =
		create_singlethread_workqueue(wpan_phy_name(priv->phy));
	if (!priv->dev_workqueue)
		goto out;

	wpan_phy_set_dev(priv->phy, priv->hw.parent);

	priv->phy->add_iface = mac802154_add_iface;
	priv->phy->del_iface = mac802154_del_iface;
	priv->phy->set_txpower = mac802154_set_txpower;
	priv->phy->set_lbt = mac802154_set_lbt;
	priv->phy->set_cca_mode = mac802154_set_cca_mode;
	priv->phy->set_cca_ed_level = mac802154_set_cca_ed_level;
	priv->phy->set_csma_params = mac802154_set_csma_params;
	priv->phy->set_frame_retries = mac802154_set_frame_retries;

	rc = wpan_phy_register(priv->phy);
	if (rc < 0)
		goto out_wq;

	rtnl_lock();

	mutex_lock(&priv->slaves_mtx);
	priv->running = MAC802154_DEVICE_RUN;
	mutex_unlock(&priv->slaves_mtx);

	rtnl_unlock();

	return 0;

out_wq:
	destroy_workqueue(priv->dev_workqueue);
out:
	return rc;
}
EXPORT_SYMBOL(ieee802154_register_device);

void ieee802154_unregister_device(struct ieee802154_dev *dev)
{
	struct mac802154_priv *priv = mac802154_to_priv(dev);
	struct mac802154_sub_if_data *sdata, *next;

	flush_workqueue(priv->dev_workqueue);
	destroy_workqueue(priv->dev_workqueue);

	rtnl_lock();

	mutex_lock(&priv->slaves_mtx);
	priv->running = MAC802154_DEVICE_STOPPED;
	mutex_unlock(&priv->slaves_mtx);

	list_for_each_entry_safe(sdata, next, &priv->slaves, list) {
		mutex_lock(&sdata->hw->slaves_mtx);
		list_del(&sdata->list);
		mutex_unlock(&sdata->hw->slaves_mtx);

		unregister_netdevice(sdata->dev);
	}

	rtnl_unlock();

	wpan_phy_unregister(priv->phy);
}
EXPORT_SYMBOL(ieee802154_unregister_device);

MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
1010f540	1	/*
	2	* Copyright (C) 2007-2012 Siemens AG
	3	*
	4	* Written by:
	5	* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
	6	*
	7	* Based on the code from 'linux-zigbee.sourceforge.net' project.
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2
	11	* as published by the Free Software Foundation.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License along
	19	* with this program; if not, write to the Free Software Foundation, Inc.,
	20	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	21	*/
	22
	23	#include <linux/kernel.h>
	24	#include <linux/module.h>
	25	#include <linux/netdevice.h>
	26
62610ad2	27	#include <net/netlink.h>
62610ad2	28	#include <linux/nl802154.h>
1010f540	29	#include <net/mac802154.h>
b70ab2e8	30	#include <net/ieee802154_netdev.h>
1010f540	31	#include <net/route.h>
	32	#include <net/wpan-phy.h>
	33
	34	#include "mac802154.h"
	35
62610ad2	36	int mac802154_slave_open(struct net_device *dev)
	37	{
	38	struct mac802154_sub_if_data *priv = netdev_priv(dev);
336908f6	39	struct mac802154_sub_if_data *subif;
62610ad2	40	struct mac802154_priv *ipriv = priv->hw;
	41	int res = 0;
	42
336908f6 PB	43	ASSERT_RTNL();
	44
	45	if (priv->type == IEEE802154_DEV_WPAN) {
	46	mutex_lock(&priv->hw->slaves_mtx);
	47	list_for_each_entry(subif, &priv->hw->slaves, list) {
	48	if (subif != priv && subif->type == priv->type &&
	49	subif->running) {
	50	mutex_unlock(&priv->hw->slaves_mtx);
	51	return -EBUSY;
	52	}
	53	}
	54	mutex_unlock(&priv->hw->slaves_mtx);
	55	}
	56
	57	mutex_lock(&priv->hw->slaves_mtx);
	58	priv->running = true;
	59	mutex_unlock(&priv->hw->slaves_mtx);
	60
62610ad2	61	if (ipriv->open_count++ == 0) {
	62	res = ipriv->ops->start(&ipriv->hw);
	63	WARN_ON(res);
	64	if (res)
	65	goto err;
	66	}
	67
	68	if (ipriv->ops->ieee_addr) {
b70ab2e8 PB	69	__le64 addr = ieee802154_devaddr_from_raw(dev->dev_addr);
	70
	71	res = ipriv->ops->ieee_addr(&ipriv->hw, addr);
62610ad2	72	WARN_ON(res);
	73	if (res)
	74	goto err;
	75	mac802154_dev_set_ieee_addr(dev);
	76	}
	77
	78	netif_start_queue(dev);
	79	return 0;
	80	err:
	81	priv->hw->open_count--;
	82
	83	return res;
	84	}
	85
	86	int mac802154_slave_close(struct net_device *dev)
	87	{
	88	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	89	struct mac802154_priv *ipriv = priv->hw;
	90
336908f6 PB	91	ASSERT_RTNL();
336908f6 PB	92
62610ad2	93	netif_stop_queue(dev);
62610ad2	94
336908f6 PB	95	mutex_lock(&priv->hw->slaves_mtx);
	96	priv->running = false;
	97	mutex_unlock(&priv->hw->slaves_mtx);
	98
62610ad2	99	if (!--ipriv->open_count)
	100	ipriv->ops->stop(&ipriv->hw);
	101
	102	return 0;
	103	}
	104
	105	static int
	106	mac802154_netdev_register(struct wpan_phy phy, struct net_device dev)
	107	{
	108	struct mac802154_sub_if_data *priv;
	109	struct mac802154_priv *ipriv;
	110	int err;
	111
	112	ipriv = wpan_phy_priv(phy);
	113
	114	priv = netdev_priv(dev);
	115	priv->dev = dev;
	116	priv->hw = ipriv;
	117
	118	dev->needed_headroom = ipriv->hw.extra_tx_headroom;
	119
	120	SET_NETDEV_DEV(dev, &ipriv->phy->dev);
	121
	122	mutex_lock(&ipriv->slaves_mtx);
	123	if (!ipriv->running) {
	124	mutex_unlock(&ipriv->slaves_mtx);
	125	return -ENODEV;
	126	}
	127	mutex_unlock(&ipriv->slaves_mtx);
	128
	129	err = register_netdev(dev);
	130	if (err < 0)
	131	return err;
	132
	133	rtnl_lock();
	134	mutex_lock(&ipriv->slaves_mtx);
	135	list_add_tail_rcu(&priv->list, &ipriv->slaves);
	136	mutex_unlock(&ipriv->slaves_mtx);
	137	rtnl_unlock();
	138
	139	return 0;
	140	}
	141
	142	static void
	143	mac802154_del_iface(struct wpan_phy phy, struct net_device dev)
	144	{
	145	struct mac802154_sub_if_data *sdata;
	146	ASSERT_RTNL();
	147
	148	sdata = netdev_priv(dev);
	149
	150	BUG_ON(sdata->hw->phy != phy);
	151
	152	mutex_lock(&sdata->hw->slaves_mtx);
	153	list_del_rcu(&sdata->list);
	154	mutex_unlock(&sdata->hw->slaves_mtx);
	155
	156	synchronize_rcu();
	157	unregister_netdevice(sdata->dev);
	158	}
	159
	160	static struct net_device *
	161	mac802154_add_iface(struct wpan_phy phy, const char name, int type)
	162	{
163	struct net_device *dev;
164	int err = -ENOMEM;
165
62610ad2	166	switch (type) {
0606069d	167	case IEEE802154_DEV_MONITOR:
	168	dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
	169	name, mac802154_monitor_setup);
	170	break;
32bad7e3	171	case IEEE802154_DEV_WPAN:
	172	dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
	173	name, mac802154_wpan_setup);
	174	break;
62610ad2	175	default:
	176	dev = NULL;
	177	err = -EINVAL;
	178	break;
	179	}
	180	if (!dev)
	181	goto err;
	182
	183	err = mac802154_netdev_register(phy, dev);
	184	if (err)
	185	goto err_free;
	186
	187	dev_hold(dev); /* we return an incremented device refcount */
	188	return dev;
	189
	190	err_free:
	191	free_netdev(dev);
	192	err:
	193	return ERR_PTR(err);
	194	}
	195
9b2777d6 PB	196	static int mac802154_set_txpower(struct wpan_phy *phy, int db)
	197	{
	198	struct mac802154_priv *priv = wpan_phy_priv(phy);
	199
	200	if (!priv->ops->set_txpower)
	201	return -ENOTSUPP;
	202
	203	return priv->ops->set_txpower(&priv->hw, db);
	204	}
	205
84dda3c6 PB	206	static int mac802154_set_lbt(struct wpan_phy *phy, bool on)
	207	{
	208	struct mac802154_priv *priv = wpan_phy_priv(phy);
	209
	210	if (!priv->ops->set_lbt)
	211	return -ENOTSUPP;
	212
	213	return priv->ops->set_lbt(&priv->hw, on);
	214	}
	215
ba08fea5 PB	216	static int mac802154_set_cca_mode(struct wpan_phy *phy, u8 mode)
	217	{
	218	struct mac802154_priv *priv = wpan_phy_priv(phy);
	219
	220	if (!priv->ops->set_cca_mode)
	221	return -ENOTSUPP;
	222
	223	return priv->ops->set_cca_mode(&priv->hw, mode);
	224	}
	225
6ca00197 PB	226	static int mac802154_set_cca_ed_level(struct wpan_phy *phy, s32 level)
	227	{
	228	struct mac802154_priv *priv = wpan_phy_priv(phy);
	229
	230	if (!priv->ops->set_cca_ed_level)
	231	return -ENOTSUPP;
	232
	233	return priv->ops->set_cca_ed_level(&priv->hw, level);
	234	}
	235
4244db1b PB	236	static int mac802154_set_csma_params(struct wpan_phy *phy, u8 min_be,
	237	u8 max_be, u8 retries)
	238	{
	239	struct mac802154_priv *priv = wpan_phy_priv(phy);
	240
	241	if (!priv->ops->set_csma_params)
	242	return -ENOTSUPP;
	243
	244	return priv->ops->set_csma_params(&priv->hw, min_be, max_be, retries);
	245	}
	246
	247	static int mac802154_set_frame_retries(struct wpan_phy *phy, s8 retries)
	248	{
	249	struct mac802154_priv *priv = wpan_phy_priv(phy);
	250
	251	if (!priv->ops->set_frame_retries)
	252	return -ENOTSUPP;
	253
	254	return priv->ops->set_frame_retries(&priv->hw, retries);
	255	}
	256
1010f540	257	struct ieee802154_dev *
	258	ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops)
	259	{
	260	struct wpan_phy *phy;
	261	struct mac802154_priv *priv;
	262	size_t priv_size;
	263
	264	if (!ops \|\| !ops->xmit \|\| !ops->ed \|\| !ops->start \|\|
	265	!ops->stop \|\| !ops->set_channel) {
83a1a7ce	266	pr_err("undefined IEEE802.15.4 device operations\n");
1010f540	267	return NULL;
	268	}
	269
	270	/* Ensure 32-byte alignment of our private data and hw private data.
	271	* We use the wpan_phy priv data for both our mac802154_priv and for
	272	* the driver's private data
	273	*
	274	* in memory it'll be like this:
	275	*
	276	* +-----------------------+
	277	* \| struct wpan_phy \|
	278	* +-----------------------+
	279	* \| struct mac802154_priv \|
	280	* +-----------------------+
	281	* \| driver's private data \|
	282	* +-----------------------+
	283	*
	284	* Due to ieee802154 layer isn't aware of driver and MAC structures,
	285	* so lets allign them here.
	286	*/
	287
	288	priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len;
	289
	290	phy = wpan_phy_alloc(priv_size);
	291	if (!phy) {
83a1a7ce	292	pr_err("failure to allocate master IEEE802.15.4 device\n");
1010f540	293	return NULL;
	294	}
	295
	296	priv = wpan_phy_priv(phy);
	297	priv->hw.phy = priv->phy = phy;
	298	priv->hw.priv = (char )priv + ALIGN(sizeof(priv), NETDEV_ALIGN);
	299	priv->ops = ops;
	300
	301	INIT_LIST_HEAD(&priv->slaves);
	302	mutex_init(&priv->slaves_mtx);
	303
	304	return &priv->hw;
	305	}
	306	EXPORT_SYMBOL(ieee802154_alloc_device);
	307
	308	void ieee802154_free_device(struct ieee802154_dev *hw)
	309	{
	310	struct mac802154_priv *priv = mac802154_to_priv(hw);
	311
62610ad2	312	BUG_ON(!list_empty(&priv->slaves));
62610ad2	313
1010f540	314	mutex_destroy(&priv->slaves_mtx);
1e9f9545 KK	315
1e9f9545 KK	316	wpan_phy_free(priv->phy);
1010f540	317	}
	318	EXPORT_SYMBOL(ieee802154_free_device);
	319
	320	int ieee802154_register_device(struct ieee802154_dev *dev)
	321	{
	322	struct mac802154_priv *priv = mac802154_to_priv(dev);
	323	int rc = -ENOMEM;
	324
	325	priv->dev_workqueue =
	326	create_singlethread_workqueue(wpan_phy_name(priv->phy));
	327	if (!priv->dev_workqueue)
	328	goto out;
	329
	330	wpan_phy_set_dev(priv->phy, priv->hw.parent);
	331
62610ad2	332	priv->phy->add_iface = mac802154_add_iface;
62610ad2	333	priv->phy->del_iface = mac802154_del_iface;
9b2777d6	334	priv->phy->set_txpower = mac802154_set_txpower;
84dda3c6	335	priv->phy->set_lbt = mac802154_set_lbt;
ba08fea5	336	priv->phy->set_cca_mode = mac802154_set_cca_mode;
6ca00197	337	priv->phy->set_cca_ed_level = mac802154_set_cca_ed_level;
4244db1b PB	338	priv->phy->set_csma_params = mac802154_set_csma_params;
4244db1b PB	339	priv->phy->set_frame_retries = mac802154_set_frame_retries;
62610ad2	340
1010f540	341	rc = wpan_phy_register(priv->phy);
	342	if (rc < 0)
	343	goto out_wq;
	344
	345	rtnl_lock();
	346
	347	mutex_lock(&priv->slaves_mtx);
	348	priv->running = MAC802154_DEVICE_RUN;
	349	mutex_unlock(&priv->slaves_mtx);
	350
	351	rtnl_unlock();
	352
	353	return 0;
	354
	355	out_wq:
	356	destroy_workqueue(priv->dev_workqueue);
	357	out:
	358	return rc;
	359	}
	360	EXPORT_SYMBOL(ieee802154_register_device);
	361
	362	void ieee802154_unregister_device(struct ieee802154_dev *dev)
	363	{
	364	struct mac802154_priv *priv = mac802154_to_priv(dev);
62610ad2	365	struct mac802154_sub_if_data sdata, next;
1010f540	366
	367	flush_workqueue(priv->dev_workqueue);
	368	destroy_workqueue(priv->dev_workqueue);
	369
	370	rtnl_lock();
	371
	372	mutex_lock(&priv->slaves_mtx);
	373	priv->running = MAC802154_DEVICE_STOPPED;
	374	mutex_unlock(&priv->slaves_mtx);
	375
62610ad2	376	list_for_each_entry_safe(sdata, next, &priv->slaves, list) {
	377	mutex_lock(&sdata->hw->slaves_mtx);
	378	list_del(&sdata->list);
	379	mutex_unlock(&sdata->hw->slaves_mtx);
	380
	381	unregister_netdevice(sdata->dev);
	382	}
	383
1010f540	384	rtnl_unlock();
	385
	386	wpan_phy_unregister(priv->phy);
	387	}
	388	EXPORT_SYMBOL(ieee802154_unregister_device);
	389
	390	MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
	391	MODULE_LICENSE("GPL v2");